Just as Poser keeps the mesh (the OBJ file) in the geometries folder and the texture in the Textures folder, so DAZ|Studio keeps the mesh in its own format in the Data folder (in the first DAZ|Studio content directory for saving, though it will read from the Data folder in any D|S content folder). You need to open the props in the destination maachine's copy of DAZ|Studio and save them as a scene file to create a local copy of the D|S mesh files (or if they are your own props you can find the subfolders of the Data folder named _ and ciopt that as well as the .daz scene file).